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  2. Q code - Wikipedia

    en.wikipedia.org/wiki/Q_code

    The Q-code is a standardised collection of three-letter codes that each start with the letter "Q". It is an operating signal initially developed for commercial radiotelegraph communication and later adopted by other radio services, especially amateur radio.

  3. QRM - Wikipedia

    en.wikipedia.org/wiki/QRM

    Print/export Download as PDF; Printable version; ... move to sidebar hide. QRM may refer to: Amateur radio Q code for "I have interference" Quick Response ...

  4. List of amateur radio modes - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio_modes

    Morse code is called the original digital mode. Radio telegraphy, designed for machine-to-machine communication is the direct on / off keying of a continuous wave carrier by Morse code symbols, often called amplitude-shift keying or ASK, may be considered to be an amplitude modulated mode of communications, and is rightfully considered the first digital data mode.

  5. ACP 131 - Wikipedia

    en.wikipedia.org/wiki/ACP_131

    Radio communications, prior to the advent of landlines and satellites as communication paths and relays, was always subject to unpredictable fade outs caused by weather conditions, practical limits on available emission power at the transmitter, radio frequency of the transmission, type of emission, type of transmitting antenna, signal waveform characteristics, modulation scheme in use ...

  6. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    They provide specific abbreviations for concepts related to aviation, shipping, RTTY, radiotelegraph, and amateur radio. [38] In radiotelegraph operation, a Q code is often shorter, [39] and provides codes standardized by meaning in all languages – essential for international shortwave radio communications.

  7. Radio code - Wikipedia

    en.wikipedia.org/wiki/Radio_code

    Morse code, is commonly used in Amateur radio. Morse code abbreviations are a type of brevity code. Procedure words used in radiotelephony procedure, are a type of radio code. Spelling alphabets, including the ICAO spelling alphabet, are commonly used in communication over radios and telephones.

  8. Contact (amateur radio) - Wikipedia

    en.wikipedia.org/wiki/Contact_(amateur_radio)

    An amateur radio contact, more commonly referred to as simply a "contact", is an exchange of information between two amateur radio stations. The exchange usually consists of an initial call, a response by another amateur radio operator at an amateur radio station, and a signal report. A contact is often referred to by the Q code QSO. It is ...

  9. Amateur radio licensing in the United States - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_licensing_in...

    FCC amateur radio station license of Al Gross. In the United States, amateur radio licensing is governed by the Federal Communications Commission (FCC). Licenses to operate amateur stations for personal use are granted to individuals of any age once they demonstrate an understanding of both pertinent FCC regulations and knowledge of radio station operation and safety considerations.